Ensure kubectl in PATH for kubens

kubens

@@ -156,6 +156,10 @@ swap_namespace() {
 }
 
 main() {
+  if ! hash kubectl 2>/dev/null; then
+   echo >&2 "kubectl is not installed"
+   exit 1
+  fi
   if [[ "$#" -eq 0 ]]; then
     if [[ -t 1 && -z ${KUBECTX_IGNORE_FZF:-} && "$(type fzf &>/dev/null; echo $?)" -eq 0 ]]; then
       choose_namespace_interactive